I took the index in the words, converted the variety to binary, added 3 zeros, calculated the sha256 digest, took the first Portion of the hexadecimal to convert it to binary, additional three zeros for the eight digits with the binary and obtained 00000010011 which translates to 19 in decimal. https://myfirstbookmark.com/story18978361/little-known-facts-about-bip39-seed-phrase-list